JP2005214119A - Exhaust pipe - Google Patents

Exhaust pipe Download PDF

Info

Publication number
JP2005214119A
JP2005214119A JP2004023601A JP2004023601A JP2005214119A JP 2005214119 A JP2005214119 A JP 2005214119A JP 2004023601 A JP2004023601 A JP 2004023601A JP 2004023601 A JP2004023601 A JP 2004023601A JP 2005214119 A JP2005214119 A JP 2005214119A
Authority
JP
Japan
Prior art keywords
pipe
bent
vehicle
exhaust pipe
exhaust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2004023601A
Other languages
Japanese (ja)
Inventor
Tomoyuki Fujita
智幸 藤田
Yasuhiro Isogawa
康博 五十川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sango Co Ltd
Toyota Motor Corp
Original Assignee
Sango Co Ltd
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sango Co Ltd, Toyota Motor Corp filed Critical Sango Co Ltd
Priority to JP2004023601A priority Critical patent/JP2005214119A/en
Priority to US11/044,210 priority patent/US20060032694A1/en
Publication of JP2005214119A publication Critical patent/JP2005214119A/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust pipe capable of suitably reducing repetitive stress generated by vibration of an exhaust system by a simple structure. <P>SOLUTION: Front pipes 15, 16 and a rear pipe 21 extending in the longitudinal direction of a vehicle are connected with each other by an intermediate pipe 20 extending in the width direction of the vehicle. In the middle part 30 of the intermediate pipe 20, a first bent part 25 and a second bent part bent in the vehicle longitudinal direction are formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、車両の排気管に関するものである。   The present invention relates to an exhaust pipe of a vehicle.

従来、車両に搭載されるエンジンの排気管は、その途中に排気を浄化する触媒コンバータやマフラ等が設けられており、マウント部材によって車体に取り付けられる。エンジンの振動といった繰り返し荷重が排気管に伝達されると、排気管の耐久性や信頼性が低下するばかりか、排気管からの振動がマウント部材を介して車体に伝達され、車内に不快な騒音が発生する。そこで、このような不具合を解消するために、球面継手（ボールジョイント）や自在継手（フレキシブルジョイント）等の振動遮断機構を備えた排気管が提案されている（特許文献１参照）。かかる振動遮断機構は、排気管の途中に設けられ、エンジンからの振動が排気管に伝達されると、振動遮断機構の上流部分と下流部分とを相対的に変位させ、上流側から下流側に振動が伝達されるのを抑制する役割がある。
実開昭６１−０７４６２０号公報 2. Description of the Related Art Conventionally, an exhaust pipe of an engine mounted on a vehicle is provided with a catalytic converter, a muffler, or the like that purifies exhaust gas in the middle of the exhaust pipe, and is attached to a vehicle body by a mount member. If a repeated load such as engine vibration is transmitted to the exhaust pipe, not only the durability and reliability of the exhaust pipe will be reduced, but vibration from the exhaust pipe will be transmitted to the vehicle body via the mounting member, causing unpleasant noise inside the vehicle. Will occur. In order to solve such problems, there has been proposed an exhaust pipe provided with a vibration blocking mechanism such as a spherical joint (ball joint) or a universal joint (flexible joint) (see Patent Document 1). Such a vibration isolation mechanism is provided in the middle of the exhaust pipe, and when the vibration from the engine is transmitted to the exhaust pipe, the upstream part and the downstream part of the vibration isolation mechanism are relatively displaced so that the upstream side to the downstream side. There is a role which suppresses that a vibration is transmitted.
Japanese Utility Model Publication No. 61-074620

ところが、従来の排気管は、振動遮断機構を設けているため、その設置スペースを余分に確保する必要があるとともに、部品点数が増え大幅なコストアップを招くという不具合がある。   However, since the conventional exhaust pipe is provided with the vibration isolating mechanism, it is necessary to secure an extra installation space, and there is a problem that the number of parts increases and the cost is greatly increased.

本発明は、このような従来の技術に存在する問題点に着目してなされたものである。その目的は、簡易な構成をもって排気系の振動により生じる繰り返し応力を好適に低減することのできる排気管を提供することにある。   The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide an exhaust pipe capable of suitably reducing the repeated stress caused by the vibration of the exhaust system with a simple configuration.

以下、上記課題を解決するための手段及びその作用効果について記載する。
請求項１に記載の発明では、車両の前後方向に沿って延びるフロントパイプとリアパイプとを車両幅方向に延びる中間パイプで接続してなる排気管において、前記中間パイプはその中途部分に、車両前後方向に曲げられた曲げ部を有することを要旨とする。 Hereinafter, means for solving the above-described problems and the effects thereof will be described.
According to the first aspect of the present invention, in the exhaust pipe formed by connecting the front pipe and the rear pipe extending along the front-rear direction of the vehicle with the intermediate pipe extending in the vehicle width direction, the intermediate pipe is disposed in the middle of the vehicle. The gist of the present invention is to have a bent portion bent into the shape.

この構成とすれば、中間パイプの中途部分に曲げ部を形成したことによってその剛性が低くなるため、簡易な構成であるにもかかわらず、中間パイプの振動に伴って生じる繰り返し応力を低減することができるようになる。   With this configuration, the bending portion is formed in the middle part of the intermediate pipe to reduce its rigidity, so that it is possible to reduce the repeated stress caused by the vibration of the intermediate pipe despite the simple configuration. Will be able to.

請求項２に記載の発明では、請求項１に記載の排気管において、前記中間パイプは前記曲げ部を複数有し、それら曲げ部は互いに異なる方向に曲げられていることを要旨とする。   The invention according to claim 2 is characterized in that, in the exhaust pipe according to claim 1, the intermediate pipe has a plurality of the bent portions, and the bent portions are bent in different directions.

この構成とすれば、曲げ部を複数有し、更にそれら曲げ部の曲げ方向が互いに異なる方向となっていることから、中間パイプの剛性がより一層低くなり、繰り返し応力の低減効果をよりいっそう向上させることができるようになる。   With this configuration, since there are a plurality of bent portions and the bending directions of the bent portions are different from each other, the rigidity of the intermediate pipe is further reduced, and the repeated stress reduction effect is further improved. To be able to.

又、このように複数の曲げ部を有する場合には、請求項３に記載される発明のように、中間パイプは少なくとも第１の曲げ部と第２の曲げ部とを有し、それらの間の部分が車両幅方向に対して斜めに延びるといった構成を採用するのが剛性の更なる低減を図るうえで望ましい。或いは、請求項４に記載される発明のように、それら各曲げ部の位置が車両前後方向において異なるといった構成を採用するのが剛性の更なる低減を図るうえで望ましい。   Further, in the case of having a plurality of bent portions as described above, the intermediate pipe has at least a first bent portion and a second bent portion as in the invention described in claim 3. In order to further reduce the rigidity, it is desirable to adopt a configuration in which the portion extends obliquely with respect to the vehicle width direction. Alternatively, as in the invention described in claim 4, it is desirable to adopt a configuration in which the positions of the respective bent portions are different in the vehicle front-rear direction in order to further reduce the rigidity.

又、上記各請求項に記載の発明において、フロントパイプを一対のパイプからなる構成、具体的には、請求項５に記載される発明のように、フロントパイプはリアパイプに接続される第１のフロントパイプと前記中間パイプに接続される第２のフロントパイプからなる、といった構成を採用することもできる。   Further, in the invention described in the above claims, the front pipe is constituted by a pair of pipes. Specifically, as in the invention described in claim 5, the front pipe is a first front pipe connected to the rear pipe. A configuration in which the second front pipe is connected to the intermediate pipe may be employed.

以下、本発明を具体化した一実施形態について、図面を参照して説明する。
図１に示すように、内燃機関であるエンジン１１には、各気筒からの排気（燃焼ガス）を一箇所に集中させる図示しない排気マニホールドを介して排気管１２が接続されている。この排気管１２は、振動を吸収するための図示しないマウント部材を介して車体に取り付けられ、車両１４の前後方向に沿って延びる第１及び第２のフロントパイプ１５，１６とを備えている。両フロントパイプ１５，１６はほぼ並列な関係で配置されており、それらの途中には排気を浄化する複数の触媒コンバータ１７ａ，１７ｂ，１８ａ，１８ｂがそれぞれ直列に接続されている。 Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings.
As shown in FIG. 1, an exhaust pipe 12 is connected to an engine 11 that is an internal combustion engine via an exhaust manifold (not shown) that concentrates exhaust (combustion gas) from each cylinder in one place. The exhaust pipe 12 is attached to the vehicle body via a mount member (not shown) for absorbing vibration, and includes first and second front pipes 15 and 16 extending along the front-rear direction of the vehicle 14. Both front pipes 15 and 16 are arranged in a substantially parallel relationship, and a plurality of catalytic converters 17a, 17b, 18a and 18b for purifying exhaust gas are connected in series in the middle thereof.

第１のフロントパイプ１５には、接続パイプ１９を介して、排気騒音を低減するためのマフラ２２を有するリアパイプ２１が接続されている。第２のフロントパイプ１６の下流側端部は、中間パイプ２０を介して接続パイプ１９に接続されている。これにより、エンジン１１からの排気は、各フロントパイプ１５，１６を通って接続パイプ１９で１つに合流され、リアパイプ２１を介して排出される。   A rear pipe 21 having a muffler 22 for reducing exhaust noise is connected to the first front pipe 15 via a connection pipe 19. The downstream end of the second front pipe 16 is connected to the connection pipe 19 via the intermediate pipe 20. As a result, the exhaust from the engine 11 passes through the front pipes 15 and 16, joins together at the connection pipe 19, and is discharged through the rear pipe 21.

前記中間パイプ２０は、全体が略クランク状をなし、両端部を除く中途部分が車両１４の幅方向に延びている。そのため、第２のフロントパイプ１６は、リアパイプ２１と車両１４の幅方向において互いの位置がずれるように配置されているのに対し、第１のフロントパイプ１５は、リアパイプ２１の延長線上に配置されている。   The intermediate pipe 20 has a substantially crank shape as a whole, and a midway portion excluding both ends extends in the width direction of the vehicle 14. Therefore, the second front pipe 16 is disposed so that the positions of the rear pipe 21 and the vehicle 14 are shifted in the width direction, whereas the first front pipe 15 is disposed on an extension line of the rear pipe 21. .

次に、本実施形態の要部について説明する。
図２，図３に示すように、中間パイプ２０において両端部にある湾曲部２３，２４を除いた箇所である中途部分３０には、「く」字状をなす第１及び第２の曲げ部２５，２６が形成されている。これら曲げ部２５，２６を設けたのは、中間パイプ２０の剛性を低減するためである。各曲げ部２５，２６は互いに異なる方向に曲げられている。ここでは、上流側に位置する第１の曲げ部２５は、車両１４の後方に曲げられているのに対して、下流側に位置する第２の曲げ部２６は車両１４の前方に曲げられている。更に、これら曲げ部２５，２６の位置は、車両１４の前後方向において異なっている。ここでは、第１の曲げ部２５が車両１４のリア側に位置しているのに対し、第２の曲げ部２６は車両１４のフロント側に位置している。そして、これらの曲げ部２５，２６が複合されることにより、中間パイプ２０の中途部分３０は、真上から見るとジグザグ状をなしている。 Next, the main part of this embodiment will be described.
As shown in FIGS. 2 and 3, first and second bent portions having a “<” shape are formed in the middle portion 30 of the intermediate pipe 20 except for the curved portions 23 and 24 at both ends. 25 and 26 are formed. The reason why the bent portions 25 and 26 are provided is to reduce the rigidity of the intermediate pipe 20. The bent portions 25 and 26 are bent in different directions. Here, the first bent portion 25 located on the upstream side is bent rearward of the vehicle 14, whereas the second bent portion 26 located on the downstream side is bent forward of the vehicle 14. Yes. Further, the positions of the bent portions 25 and 26 are different in the front-rear direction of the vehicle 14. Here, the first bent portion 25 is located on the rear side of the vehicle 14, while the second bent portion 26 is located on the front side of the vehicle 14. Then, by combining these bent portions 25 and 26, the middle portion 30 of the intermediate pipe 20 has a zigzag shape when viewed from directly above.

中間パイプ２０の中途部分３０において両曲げ部２５，２６の間の部分は、車両１４の幅方向に対し斜めに延びており、その斜め部分の軸線が交差する角度である、各曲げ部２５，２６の曲げ角度θ１，θ２は、いずれも同じに設定されている。ちなみに、本実施形態において曲げ部２５，２６の曲げ角度θ１，θ２は、鈍角（１３０°）に設定されている。曲げ部２５，２６の曲げ角度θ１，θ２は、排気の流れに支障をきたす範囲でなければ、鈍角に限らず、直角又は鋭角に変更することが可能である。又、各曲げ部２５，２６の曲げ角度θ１，θ２を互いに異ならせて設定することも可能である。   In the middle portion 30 of the intermediate pipe 20, the portion between the bent portions 25, 26 extends obliquely with respect to the width direction of the vehicle 14, and each bent portion 25, which is an angle at which the axis of the oblique portion intersects. The bending angles θ1 and θ2 of 26 are set to be the same. Incidentally, in the present embodiment, the bending angles θ1 and θ2 of the bending portions 25 and 26 are set to an obtuse angle (130 °). The bending angles θ1 and θ2 of the bending portions 25 and 26 are not limited to obtuse angles but can be changed to right angles or acute angles as long as they do not interfere with the exhaust flow. It is also possible to set the bending angles θ1 and θ2 of the bending portions 25 and 26 different from each other.

中間パイプ２０は、その上流側に位置する湾曲部２３から曲げ部２５にかけて下方に傾斜した第１の傾斜部２７を有しており、下流側に位置する湾曲部２４からから曲げ部２６にかけて上方に傾斜した第２の傾斜部２８を有している。中間パイプ２０の中途部分３０において両傾斜部２７，２８の間に位置する箇所は水平部２９となっている。第１の傾斜部２７及び第２の傾斜部２８を設けたのは、中間パイプ２０に対し加わる上下方向の振動によって生じる繰り返し応力をより一層小さくするためである。   The intermediate pipe 20 has a first inclined portion 27 that is inclined downward from the bending portion 23 located on the upstream side to the bending portion 25, and is upward from the bending portion 24 located on the downstream side to the bending portion 26. The second inclined portion 28 is inclined in the direction. In the middle portion 30 of the intermediate pipe 20, a portion located between both inclined portions 27 and 28 is a horizontal portion 29. The reason why the first inclined portion 27 and the second inclined portion 28 are provided is to further reduce the repeated stress generated by the vertical vibration applied to the intermediate pipe 20.

従って、本実施形態によれば以下のような効果を得ることができる。
（１）中間パイプ２０の中途部分３０に第１及び第２の曲げ部２５，２６を形成することにより、中間パイプ２０の剛性を低減することができ、簡易な構成であるにもかかわらず、中間パイプ２０の振動によって生じる繰り返し応力を低減（緩和）することができる。この結果、第１のフロントパイプ１５或いは第２のフロントパイプ１６の途中にある、強度的に弱い溶接部分にかかる応力を低減することができる。 Therefore, according to the present embodiment, the following effects can be obtained.
(1) By forming the 1st and 2nd bending parts 25 and 26 in the middle part 30 of the intermediate pipe 20, the rigidity of the intermediate pipe 20 can be reduced. Repetitive stress caused by the vibration of the intermediate pipe 20 can be reduced (relaxed). As a result, it is possible to reduce the stress applied to the welded portion that is weak in strength in the middle of the first front pipe 15 or the second front pipe 16.

ここで、曲げ部２５，２６を有している中間パイプ２０と、曲げ部２５，２６が無い比較例の中間パイプとにおいて、第１のフロントパイプ１５上にある溶接部分（図１に符号Ａで示す部分）に発生する繰り返し応力をそれぞれ測定し、その結果を以下の表１に示す。表１から明らかなように、比較例の中間パイプでは、車両１４の上下方向に伝達される振動により生じた繰り返し応力が２７．１７ＭＰａで、車両１４の幅方向に伝達される振動により生じた繰り返し応力が２１．２９ＭＰａであることが認められた。   Here, in the intermediate pipe 20 having the bent portions 25 and 26 and the intermediate pipe of the comparative example without the bent portions 25 and 26, a welded portion (reference numeral A in FIG. 1) on the first front pipe 15. The repetitive stress generated in the portion shown in FIG. As is clear from Table 1, in the intermediate pipe of the comparative example, the repeated stress generated by the vibration transmitted in the vertical direction of the vehicle 14 is 27.17 MPa, and the repeated stress generated by the vibration transmitted in the width direction of the vehicle 14 The stress was found to be 21.29 MPa.

これに対して、実施形態の中間パイプ２０では、車両１４の上下方向に伝達される振動により生じた繰り返し応力が１８．４７ＭＰａで、車両１４の幅方向に伝達される振動により生じた繰り返し応力が２１．２９ＭＰａであることが認められた。すなわち、実施形態の中間パイプ２０は比較例と比較して、上下方向の繰り返し応力を２６．６％低減することができ、幅方向の繰り返し応力を２１．６％低減することができる。従って、実施形態の中間パイプ２０によれば、強度的に弱い溶接部分Ａ（図１参照）において、歪みが生じ得るほどの大きな繰り返し応力は生じないことが知見された。   On the other hand, in the intermediate pipe 20 of the embodiment, the repeated stress generated by the vibration transmitted in the vertical direction of the vehicle 14 is 18.47 MPa, and the repeated stress generated by the vibration transmitted in the width direction of the vehicle 14 is It was found to be 21.29 MPa. That is, the intermediate pipe 20 of the embodiment can reduce the repeated stress in the vertical direction by 26.6% and can reduce the repeated stress in the width direction by 21.6% as compared with the comparative example. Therefore, according to the intermediate pipe 20 of the embodiment, it has been found that in the welded portion A (see FIG. 1) that is weak in strength, a large repetitive stress that can cause distortion does not occur.

Figure 2005214119
（２）従来技術で述べた球面継手や自在継手等の振動遮断機構を排気管１２に設ける必要がないため、その振動遮断機構を設置するためのスペースを確保する必要がない。よって、排気管１２を配置するのに周辺部品に邪魔されずに配置することができ、設計の自由度を高くすることができる。仮に周辺部品が中間パイプ２０と干渉する位置に配置されていたとしても、周辺部品に当たらないように曲げ部２５，２６の曲げ角度θ１，θ２を設計変更することで容易に対応することができる。それとともに、排気管１２に振動遮断機構を設けなくていいので部品点数を減らすことができ、軽量化かつ低コスト化を図ることができる。
Figure 2005214119
 (2) Since it is not necessary to provide the exhaust pipe 12 with a vibration isolation mechanism such as a spherical joint or a universal joint described in the prior art, it is not necessary to secure a space for installing the vibration isolation mechanism. Therefore, the exhaust pipe 12 can be disposed without being disturbed by peripheral components, and the degree of design freedom can be increased. Even if the peripheral component is arranged at a position where it interferes with the intermediate pipe 20, it can be easily handled by changing the design of the bending angles θ1 and θ2 of the bending portions 25 and 26 so as not to hit the peripheral component. . In addition, since it is not necessary to provide a vibration isolation mechanism in the exhaust pipe 12, the number of parts can be reduced, and the weight and cost can be reduced.

（３）中間パイプ２０の中途部分３０に形成された曲げ部２５，２６は複数設けられ、それらの曲げ部２５，２６は互いに異なる方向に曲げられ、中間パイプ２０の中途部分３０がジグザグ状をなしている。そのため、中間パイプ２０の剛性の更なる低減を図ることができるとともに、車両１４の上下方向或いは幅方向といった多方向から加わる繰り返し応力の低減効果を向上することができる。   (3) A plurality of bent portions 25 and 26 formed in the middle portion 30 of the intermediate pipe 20 are provided, the bent portions 25 and 26 are bent in different directions, and the intermediate portion 30 of the intermediate pipe 20 has a zigzag shape. There is no. Therefore, the rigidity of the intermediate pipe 20 can be further reduced, and the effect of reducing the repeated stress applied from multiple directions such as the vertical direction or the width direction of the vehicle 14 can be improved.

（４）中間パイプ２０の剛性を低減するのに曲げ部２５，２６を形成するだけで済むため、従来技術で述べたボールジョイント等の振動遮断機構を設けた場合と異なり、異音が発生することがまったくない。   (4) Since it is only necessary to form the bent portions 25 and 26 to reduce the rigidity of the intermediate pipe 20, unlike the case of providing a vibration isolation mechanism such as a ball joint described in the prior art, abnormal noise is generated. There is nothing at all.

［変更例］
本発明の実施形態は以下のように変更してもよい。
・前記実施形態では、中間パイプ２０の中途部分３０に曲げ部２５，２６を２つ形成したが、１つ又は３つ以上としてもよい。 [Example of change]
The embodiment of the present invention may be modified as follows.
In the above embodiment, the two bent portions 25 and 26 are formed in the middle portion 30 of the intermediate pipe 20, but it may be one or three or more.

・前記実施形態では、中間パイプ２０において、各曲げ部２５，２６の間は直線状に形成されているが、この直線部分をなくし、曲げ部２５，２６の間を緩やかなカーブを描くように中途部分３０を湾曲させてもよい。   In the above embodiment, the intermediate pipe 20 is linearly formed between the bent portions 25 and 26, but the straight portion is eliminated so that a gentle curve is drawn between the bent portions 25 and 26. The midway portion 30 may be curved.

・前記実施形態では、上流側にある第１の曲げ部２５は車両１４の後方に曲げられ、下流側にある第２の曲げ部２６は車両１４の前方に曲げられているが、これら曲げ部２５，２６の曲げ方向を前後逆にしてもよい。すなわち、第１の曲げ部２５を車両１４の前方に向けて曲げ、第２の曲げ部２６を車両１４の後方に向けて曲げてもよい。   In the above embodiment, the first bent portion 25 on the upstream side is bent rearward of the vehicle 14 and the second bent portion 26 on the downstream side is bent forward of the vehicle 14. The bending directions of 25 and 26 may be reversed. That is, the first bent portion 25 may be bent toward the front of the vehicle 14 and the second bent portion 26 may be bent toward the rear of the vehicle 14.

一実施形態における排気管の平面図。The top view of the exhaust pipe in one Embodiment. 要部を示す排気管の拡大平面図。The enlarged plan view of the exhaust pipe which shows the principal part. 要部を示す排気管の拡大側面図。The expanded side view of the exhaust pipe which shows the principal part.

符号の説明Explanation of symbols

１２…排気管、１４…車両、１５…第１のフロントパイプ、１６…第２のフロントパイプ、２０…中間パイプ、２１…リアパイプ、２５…第１の曲げ部、２６…第２の曲げ部、３０…中途部分。   DESCRIPTION OF SYMBOLS 12 ... Exhaust pipe, 14 ... Vehicle, 15 ... 1st front pipe, 16 ... 2nd front pipe, 20 ... Intermediate pipe, 21 ... Rear pipe, 25 ... 1st bending part, 26 ... 2nd bending part, 30 ... Midway part.

Claims (5)

車両の前後方向に沿って延びるフロントパイプとリアパイプとを車両幅方向に延びる中間パイプで接続してなる排気管において、
前記中間パイプはその中途部分に、車両前後方向に曲げられた曲げ部を有する
ことを特徴とする排気管。 In an exhaust pipe formed by connecting a front pipe and a rear pipe extending along the front-rear direction of the vehicle with an intermediate pipe extending in the vehicle width direction,
The exhaust pipe according to claim 1, wherein the intermediate pipe has a bent portion bent in the vehicle front-rear direction at an intermediate portion thereof. 請求項１に記載の排気管において、前記中間パイプは前記曲げ部を複数有し、それら曲げ部は互いに異なる方向に曲げられている
ことを特徴とする排気管。 The exhaust pipe according to claim 1, wherein the intermediate pipe has a plurality of bent portions, and the bent portions are bent in different directions. 請求項２に記載の排気管において、前記中間パイプは少なくとも第１の曲げ部と第２の曲げ部とを有し、それらの間の部分が車両幅方向に対して斜めに延びている
ことを特徴とする排気管。 The exhaust pipe according to claim 2, wherein the intermediate pipe has at least a first bent portion and a second bent portion, and a portion between them extends obliquely with respect to the vehicle width direction. A featured exhaust pipe. 請求項２に記載の排気管において、前記中間パイプは少なくとも第１の曲げ部と第２の曲げ部とを有し、それら各曲げ部の位置が車両前後方向において異なる
ことを特徴とする排気管。 The exhaust pipe according to claim 2, wherein the intermediate pipe has at least a first bent portion and a second bent portion, and the positions of the bent portions are different in the vehicle front-rear direction. . 請求項１〜４のいずれかに記載の排気管において、前記フロントパイプは、前記リアパイプに接続される第１のフロントパイプと、前記中間パイプに接続される第２のフロントパイプとからなる
ことを特徴とする排気管。 The exhaust pipe according to any one of claims 1 to 4, wherein the front pipe includes a first front pipe connected to the rear pipe and a second front pipe connected to the intermediate pipe. Exhaust pipe.
JP2004023601A 2004-01-30 2004-01-30 Exhaust pipe Withdrawn JP2005214119A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004023601A JP2005214119A (en) 2004-01-30 2004-01-30 Exhaust pipe
US11/044,210 US20060032694A1 (en) 2004-01-30 2005-01-28 Exhaust pipe of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004023601A JP2005214119A (en) 2004-01-30 2004-01-30 Exhaust pipe

Publications (1)

Publication Number Publication Date
JP2005214119A true JP2005214119A (en) 2005-08-11

Family

ID=34906557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004023601A Withdrawn JP2005214119A (en) 2004-01-30 2004-01-30 Exhaust pipe

Country Status (2)

Country Link
US (1) US20060032694A1 (en)
JP (1) JP2005214119A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5019166B2 (en) * 2007-04-09 2012-09-05 スズキ株式会社 Vehicle exhaust system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763950A (en) * 1971-12-17 1973-10-09 Rockwell H Brown Combination frame and exhaust system for motor vehicles
JPS5599419A (en) * 1979-01-18 1980-07-29 Yamaha Motor Co Ltd Exhaust device for motorcycle
US5388408A (en) * 1993-10-01 1995-02-14 Lawrence-Keech Inc. Exhaust system for internal combustion engines
US5849250A (en) * 1997-02-03 1998-12-15 Timko; Mark Auxiliary catalytic converter having a back pressure relief device
US6141958A (en) * 1998-12-31 2000-11-07 Voss; Randy E. Exhaust cooling system for vehicles
DE19932349C2 (en) * 1999-07-10 2001-08-09 Porsche Ag Exhaust system
US6804955B2 (en) * 2001-09-26 2004-10-19 Darryl C. Bassani Dual motorcycle exhaust system
US6962225B2 (en) * 2004-04-07 2005-11-08 Honda Motor Company, Ltd. Pipe system for a motorcycle

Also Published As

Publication number Publication date
US20060032694A1 (en) 2006-02-16

Similar Documents

Publication Publication Date Title
US6863154B2 (en) Vibration absorbing apparatus for exhaust system of engine
US8844579B2 (en) Flexible vibration absorbing tube
JP5525333B2 (en) Arrangement structure of canister in vehicle
US20090159147A1 (en) Exhaust pipe structure
US6374600B2 (en) Vehicle engine exhaust system
US8950178B2 (en) Exhaust device of multi-cylinder engine
JP4692232B2 (en) Exhaust pipe structure
JP2005214119A (en) Exhaust pipe
US6907726B2 (en) Exhaust system for a V-type engine
JP5645130B2 (en) Piping structure of a turbocharger for vehicles
KR101969969B1 (en) Fixing structure of Exhaust Gas After treatment Device
JP4935849B2 (en) Exhaust pipe structure
JP3769255B2 (en) Support structure of silencer in vehicle
JP2009167865A (en) Plate-like bracket installing method and plate-like bracket installing structure
JP2009061950A (en) Device for supporting exhaust gas pipe line in internal combustion engine with exhaust gas turbocharger
JP7095279B2 (en) Vehicle exhaust system
US6182447B1 (en) Exhaust pipe structure for vehicle
JP2011105065A (en) Construction machine
JP2007285151A (en) Connection structure of exhaust pipe
JP2005329758A (en) Exhaust system structure
JP4424017B2 (en) Exhaust manifold for internal combustion engines
JP3006230B2 (en) Exhaust system for vehicles
JP6794804B2 (en) Bracket and bracket support structure
JPH11148347A (en) Exhaust device of v type internal combustion engine
JP4223260B2 (en) Exhaust pipe

Legal Events

Date Code Title Description
A761 Written withdrawal of application

Free format text: JAPANESE INTERMEDIATE CODE: A761

Effective date: 20071116

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20071130